Hi leedu01
After being looking at several forums, I found no solution, I knew there was an incompatibility with another plugin but did not know where or how to solve it. I am going to tell you what I did that probably is not the best solution but it worked for me and I hope it help you too.
I disable all plugins and then I started to activate all but the first plugin you should start to activate is “advance page manager”, and then the other ones.
The error did not appeare and I could activate all of them.
Although since then I’ve noticed that from time to time in the page editor when I try to go to the “all pages” it is stop to thinking for a while and this do not leave me to see all the pages, to solve it I have to do the same operation as I’ve told you, desactivate and then activate, and with that and returns to work everything.
as I say, is not a solution to the problem but at least I get no error and I can continue working.
I hope this helps
